The general regulations applied to the Swiss staff in the permanent representations (embassies, co-operation offices, consular posts) are the Convention de Vienne sur les relations diplomatiques and the Convention de Vienne sur les relations consulaires; they rule the tax exemptions on the income of Swiss personnel, the premises for the permanent representations abroad and the import of goods for personal use.
Besides, there are bilateral framework agreements with partner countries which rule the international co-operation projects and programs. They generally include tax exemptions for the import of goods and for the purchase of local goods and services needed for the implementation of projects and programs (value added taxes and custom duties).